滚珠旋压工艺的滚珠直径选择

滚珠旋压工艺参数的选择在滚珠旋压工艺中具有重要意义．根据滚珠旋压工艺参数对成形件质量的影响,通过实验研究与理论分析,提出滚珠的剥皮效应与旋压工作角有直接关系的假说,并得出工作角对成形件质量的影响图．依据最小变薄率的分析结果,对滚珠旋压工艺中滚珠直径的选择原则进行研究,提出了工程实践中滚珠直径的选择原则,实验表明,该选择原则具有较强的实用性．

Sensitivity of springback and section deformation to process parameters in rotary draw bending of thin-walled rectangular H96 brass tube

In order to study the effects of the process parameters on springback and section deformation, a sensitivity analysis model was established based on the combination use of the multi-parameter sensitivity analysis method and the springback/section deformation prediction finite element model, and by using this model the sensitivities of the springback and the section deformation to process parameters were analyzed and compared. The results show that the most sensitive process conditions for springback angle are the boost speed and the pressure of pressure die, and the most sensitive process condition for section deformation is the number of cores. When the clamp force, the boost speed and the pressure of pressure die are utilized to control section deformation, the effect of these process parameters on springback should be considered. When the process parameters are mainly used to control springback, the effect of these process parameters on the section deformation should be always considered.